欧洲电信标准（ETS）的最终草案解决了高阶和低阶路径层网元内自动保护切换的管理问题。它涵盖了ITU-T建议G.803[2]和G.841[4]中所述的子网连接保护（SNCP）。该ETS为同步数字体系（SDH）网络的SNCP提供了一个信息模型。该模型描述了SDH网元子网连接保护功能管理的托管对象类及其属性。这些对象与ITU T建议M.3010[1]中定义的标准化接口之间交换的信息有关。本ETS适用于执行子网连接保护功能的SDH网元，以及电信管理网（TMN）中管理SDH网元的系统。 本ETS定义了一个信息模型，与SDH的子网连接保护功能有关。本ETS未定义:-用于消息通信的协议栈-网络级管理流程-应用环境-该信息模型的实现需要满足的一致性要求-其他系统或设备的信息模型。此处定义的信息模型（以及相应的消息集）涉及网络元素的管理、实现它们的设备以及其中包含的功能。更准确地说，它适用于在元素管理器到元素界面上可见的设备域，只涉及该域内可用的信息。适用于网络级管理过程域的信息不包括在此模型中。

This final draft European Telecommunication Standard (ETS) addresses the management of the automatic protection switching within network element at the high and low order path layers. It covers the Sub Network Connection Protection (SNCP) as described in ITU-T Recommendations G.803 [2] and G.841 [4]. This ETS provides an information model, for the SNCP of Synchronous Digital Hierarchy (SDH) network. This model describes the managed object classes and their properties for the management of the sub network connection protection function for SDH network elements. These objects are relevant to information exchanged across standardised interfaces defined in the ITU T Recommendation M.3010 [1]. This ETS applies to SDH network elements which perform the sub network connection protection function and those systems in the Telecommunication Management Network (TMN) that manage SDH network elements. This ETS defines: - an information model, as related to the sub network connection protection function for the SDH. This ETS does not define: - the protocol stack to be used for message communication; - the network level management processes; - the application contexts; - the conformance requirements to be met by an implementation of this information model; - information models for other systems or equipment. The information model defined here (and the corresponding message set) is concerned with the management of network elements, the equipment by which they are implemented and the functions contained within them. More precisely, it applies to an equipment domain visible at the element manager to element interface and is only concerned with information available within that domain. Information proper to the domain of a network level management processris not included within this model.